Door lock



April 6, 1937.

H. O. GRIMSRUD Filed Nov. 20, 1935 2 Sheets-Sheet 1 INVENTOR. HA NS OLSEN GR/MS/E'UD BY A41 A ORNEY.

April 6, 1937. H. o. GRIMSRUD DOOR LOCK Filed Nov 20. 1935 I 2 Sheets- Sheet 2 Hi1 u INVENTOR.

OLSEN GR/MSEUD HA/vs ATTORNEY.

Patented Apr. 6, 1937 umrso STATES! PATENT OFFICE Application November 20, 1935, Serial No. 50,723 In Japan November 26, 1934 14 Claims.

The present invention relates to improvements in door locks and its principal object is to provide a lock of the character described that is simple, has only a few and sturdy parts and may be cheaply constructed.

A further object of the invention is to provide a door lock with a double locking feature, one locking featureserving the purpose of holding one of the handles against turning and the other feature serving the purpose of positively locking the retractable bolt against movement so as to make it impossible for an unauthorized person to push back the bolt by tampering with the projecting front end thereof.

A further object of the invention is to provide a door lock in which the bolt has a relatively long throw so as to make it more difficult to tamper with it and in which the center line of the handles and the lock mechanism is relatively close to the edge of the door so that my lock may be used. on a door having relatively narrow edge members while on the other hand only a little wood need be removed whereby unnecessary weakening of the door is avoided.

25 A further object of the invention is to provide a door lock that may be easily installed and easily removed and taken apart for repair work.

Further objects and advantages of my invention will appear as the specification proceeds.-

30 The preferred form of my invention is illustrated in the accompanying drawings in which Figure 1 shows a front view of the door lock, Figure 2 a section taken along line 22 of Figure 1,.

35 Figure 3 a section taken-along line 33 of Figure 1,

Figure 4 a Figure 2,

Figure 5 a fragmentary rear view of the door lock,

Figure 6 a horizontal section taken along line 6-6 of Figure 1 and showing the lock in neutral position, in which the door may be operated by either handle,

Figure '7 a section taken along the same line, in which the outer handle is locked against rotary movement, 1

Figure 8 a similar section, in which the outer handle is locked against rotary movement and in 50 which the bolt itself is locked against retracting movement, and

Figure 9 a perspective view of a bearing used in my invention. While I have shown only the preferred form section taken alongline 4-4 of 55 of my invention I wish to have it understood that various changes or modifications may be ing 2, a bearing 3, a locking bolt 4, two operating cylinders 5 and 6 with door knobs l and 8 and a locking plate 9.

The casing 2 is preferably of rectangular form as shown in Figure 2 and is adapted for insertion into a correspondingly shaped recess in the edge of the door. It has a rear plate In and a removable face plate II which is held to the casing by means of screws i2 passing through registering apertures in the face plate and in flanges i3 projecting from the top and bottomof the casing into'the wood of the door.

The bearing 3 extends transversely through the side walls of the casing and has a 'cylindrical inner face while the outer face is squared in its rear portion as shown at H to hold the bearing against turning movement. It is formed with a peripheral slot i5 between the walls of the casing and this slot extends through the major portion of the bearing so as to leave only a limited section l6 as connection between the two sections I1 and i8 of the bearing formed by the slot. The

bearing also has a longitudinal slot H) in the rear wall thereof, this slot extending from the outer end of the bearing through the connecting section [6 within the casing.

Above and below the bearing I provide two plugs 20 which are introduced into the casing from the front and are pushed up against the rear wall. These plugs are provided with ribs 2i which ride in registering grooves 22. provided in the top and bottom faces of the bearing adjacent the casing walls so that 'upon insertion of the plugs the bearing is 'locked against endwise movement. The plugs are made in the form of sockets to receive the inner ends of springs 23 used for urging'the bolt outward, as will appear later, and

they are also formed with channels 2! facing inwardly for guiding the bolt.

The bolt 4 is particularly well illustrated in Figure 3 and comprises a head 25 formed in the conventional manner, with one curved face and one straight face, two flanges 28 projecting upwardly and downwardly respectively and .two rearwardly projecting legs 21 terminating in reverse hooks 28 pointing inwardly and toward one another so as to leave a slight space between the extremities thereof as indicated at 29. The extremities are preferably curved to form arcs onthe axis of the bearing. The bolt is normally pressed outward by the springs 23 bearing on the flanges 26 and is guided by ribs 38 riding in the channels 24 of the plugs 28 previously described.

:1 The legs of the bolt are of such a length that when #the bolt is in outward position the hooks are just -inside the bearing and slightly spaced from the inner wall thereof to allow the operating tongues 3| to enter therebetween.

The operating tongues are provided at the inner ends of the two cylinders 5 and I and these cylinders are introduced into the bearing from opposite ends thereof so that the two tongues meet in the space between the hooks 28 and the bearing wall. These cylinders have the handles I and 8 attached thereto and it will be noted that on a turning movement of either handle in eitherdirection its respective cylinder will, through its tongue, retract the bolt against the opposition of the springs 23. The cylinders are held against longitudinal movement'by means of two pins 32 slidably held to the outer faces of the casing by means of brackets 33 and passing through slots 34 in the bearing and registering slots 35 in the cylinders. These pins have forked inner ends 32 for guiding the locking plate 9.

The latter is of a width substantially equal to the inner diameter of the cylinders so as to be slidably received therein and is of a length so 30 that when one end, which is formed with a. push button 36, projects slightly beyond the inner knob 1, the other end extends well into the cylinder 8 of the knob 8. It is disposed in the cylinders horizontally and its front edge 31 is guided by the forked ends of the two pins 32 and passes between the hooks 28 so that the latter may freely ride thereon when the bolt is retracted. The rear edge of the plate has a tongue 38 projecting therefrom in the plane of the plate and this tongue rides in the slot I! of the bearing. It is sufliciently long to project beyond the back wall of the bearing and its projecting end is yieldingly held between a pair of springs 33 secured on the back wall of the casing. When this tongue is in normal position, it clears the inner ends of both cylinders 5 and 6 so as not to interfere with turning movement of either. When it is moved a short distance in the direction of the outer knob, it

enters a slot 40 in the outer cylinder 5 and thereby prevents the latter cylinder and its knob from being turned. If it is moved still further in the same direction, it enters deeper into the slot, with the 'same result, but at the same time two stops 4| which project laterally from the locking plate enter behind the inner ends of the two hooks 28 so that now the bolt is positively held against retracting motion which, of course, also prevents turning movement of the inner handle.

For moving the plate 8 I use the key controlled sleeve 42 formed with a spiral slot 43 and abutting the outer end of the plate when the latter is in normal or neutral position. This end of the plate is formed with a lip 44, by cutting a recess behind the lip.

Figure 6 shows the plate 8 in normal position and the bolt may be freely operated by use of either handle. The lip 44 isshown as resting against the fiat face of the sleeve 42. To efiect the first change, the sleeve 42 is turned counterclockwise until the lip 44 comes opposite the slot entrance and the plate 9 is then pushed outward by pressing on the inner button 36 whereby the lip 44 is made to enter the slot 43. This is the position of Figure 'I, in which the outer cylinder 75 6 is held against rotation, while the inner cylinder is free to turn and the bolt is free to retract. The door may now be opened from the inside but not from the outside.

The second change is brought about by a turning movement of the sleeve 42 in the opposite direction. The lip being within the confines of the slot 43, will be pulled outward further by the slot wall, which means-that the tongue 38 will enter more deeply into the slot 40 while at the same time the stops 4| enter behind the hooks 28 and positively prevent retracting movement of the bolt, whereby the inner handle is also prevented from turning.

For unlocking the door, the sleeve is turned in counter-clockwise direction until all the parts reach the original position.

The lock may be installed as follows: First the casing 2 is introduced into the recess of the door provided for the same and the bearing is introduced through transverse openings. Next the plugs 20 are pushed in above and below the bearing for locking the bearing against endwise movement. The springs 23 are now inserted whereupon the bolt is pushed into place and the inner cylinder 5 is inserted to hold the bolt in place by its tongue 3|. Now the locking plate 8 is inserted from the outer end, button first. so as to cause the tongue 38 to slide in the sire l9, whereupon the outer cylinder 6 is inserted, with its sleeve and locking mechanism. The pins 32 are now inserted I.

to lock the cylinders against endwise movement and to serve as guides for the front edge of the locking plate. The attaching of the face plate completes the operation.

I claim:

1. In a door look, a casing, a bearing mounted transversely therein and having grooves in the top and bottom faces thereof, means for holding the bearing against rotary motion, plugs on opposite sides of the bearing having ribs engaging said grooves for holding the bearing against endwise motion and having channels therein, a bolt having ribs riding in the channels and means within the bearing for operating the bolt.

2. In a door lock, a casing having a rear wall, a bearing mounted transversely therein and having grooves in the top and bottom faces thereof, means for holding the bearing against rotary motion, plugs on opposite sides of the bearing having ribs engaging said grooves for holding the bearing against end-wise motion and having channels therein, a bolt having ribs riding in the channels and means within the bearing for operating the bolt, the bolt having oppositely disposed flanges and springs inserted between the flanges and the rear wall of the casing and guided by the plugs for urging the bolt outward.

3. In a door look, a casing, a bearing mounted transversely therein and having grooves in the top and bottom faces thereof, means for holding the bearing against rotary motion and plugs above and below the bearing and having ribs engaging said grooves for holding the bearing against endwise motion.

4. In a door look, a casing, a bearing mounted transversely in the casing, means for holding the bearing against rotation, a bolt slidable in the casing and common means within the casing for guiding the bolt and for holding the bearing against endwise movement.

5. In a door look, a casing having a bolt retractable therein, a bearing in the casing having a cylinder revolvable therein, means on the cylinder for retracting the bolt when the cylinder is turned, a locking plate movable longitudinally in the cylinder and having means for locking the cylinder against rotation, the bearing and the cylinder having registering slots and a pin slidable on the casing and passing through the slots and having a forked end to serve as a guide for the locking plate.

6. In a door look, a retractable bolt having a pair of spaced hooks, a cylinder having means engageable with the hooks for retracting the bolt when the cylinder is turned, and a locking plate slidable in the cylinder and between the hooks and having pins disposed behind the hooks for preventing retracting movement when the locking plate is in a predetermined position.

'7. In a door look, a casing having a bolt retractable therein, a cylinder revolvable in the casing, means on the cylinder for retracting the bolt when the cylinder is turned, a locking plate :0 movable longitudinally in the cylinder and having' means for locking the cylinder against rotation, the cylinder having a slot therein and a pin slidable on the casing wall and passing through the slot and having a forked end serving as a guide for the locking plate.

8. In a door lock, a casing having a bolt retractable therein, a' cylinder revolvable in the casing, means on the cylinder for retracting the bolt when the cylinder is turned, a locking plate 33 movable longitudinally in the cylinder and having means for locking the cylinder against rotation and means mounted on the casing having means for guiding the locking plate.

. 9. In a door look, a casing, a bearing mounted transversely therein and having grooves in the top and bottom faces thereof and plugs above and below the bearing having ribs engaging said grooves for holding the bearing against endwise motion.

4o 10. In a door look, a casing, a bearing mounted transversely in the casing, a bolt slidable in the casing.- and common means within the casing for guiding the bolt and for holding the bearin against endwise-movement.

11. In a door look, a casing and a bearing extending transversely therethrough and having a block projecting from its outer face, the walls of the casing being apertured to receive the block for holding the bearing against rotation.

12. In a door lock, a casing, a bearing extending transversely therethrough and having a block projecting from its outer face and anchored in the casing walls for holding the bearing against rotation, the bearing having a peripheral slot oppositev the block, a bolt having a portion movable through the slot, and means in the bearing for operating the bolt.

13. In a door lock, a casing, a bearing extending transversely therethrough and having a block projecting from its outer face and anchored in the casing walls for holding the bearing against rotation, the bearing having a peripheral slot, opposite the block, a bolt having a portion movable through the slot, and means in the bearing for operating the bolt, the block having transverse grooves by means of which the bearing may be locked against endwise movement in the easing.

14. In a door look, a casing, a bearing extending transversely therethrough and having a block projecting from its outer face and anchored in the casing walls for holding the bearing against rotation, the bearing having a peripheral slot opposite the block, a bolt having a portion movable through the slot, and means in the bearing for operating the bolt, the bearinghaving a longitudinal slot extending from one end into the block for guiding a locking member for the bolt operating means.

HANS OLSEN GRIMSRUD. 

